Improvement in compositions for coating shingles



UNITED STATES PATENT OEEIoE.

THOMAS J. LANGLEY, OF EAST CAMBRIDGE, ASSIGNOR TO HIMSELF AND O. P.

OONANT, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN COMPOSITIONS FOR COATING SHINGLES.

Specification forming part of Letters Patent No. 117,647, dated August 1, 1871,

To all whom it may concern:

Be it known that I, THoMAsJ. LANGLEY, of East Cambridge, in the county of Middlesex and State of Massachusetts, have invented a new and Improved Composition for Coating Shingles; and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to an improved composition for shingles, slate being a prominent ingredient of the same, so that the appearance and many of the qualities, Without the correspondin g cost, weight, 850., of genuine slate shingles, may be imparted to those made of Wood. The compound consists of the following ingredients, in about the proportions named, to Wit: Bright varnish, one quart; petroleum, crude, threefourths of a quart; resinoil, one quart; ultramarine blue, eight ounces; bolted slate, four pounds; fine salt, three ounces; calcined plaster, two ounces. T

' weight or brittleness.

The mechanical mixture of these elements results in a liquid in which, when shingles are dipped all over, they receive a coating-which 

